Grinding-machine.



No. 655,753. Patented Aug. I4, 1900.

H. w. BOLENS.

GRINDING MACHINE.

' (Application filed Jan 31, 1900.) M BL) 3 Sheets-Sheet l m: News Pains50.. PHoru-umm wasnmuToN. q c.

(N o Model.)

' Patented Aug. l4, I900. j

H. W. BOLENS.

enmnms MACHINE.

(Application filed Jan. 31, 1900.)

3 Sheets-Sheet 2,

No. 655,753. Patented Aug. l4, won.

:1. w. souzus. GRINDING MACHINE.

(Appl um 11-! 31 1900 3 $heets-Sheet 3,

(No Model.)

WW6 wag Nr'rnn TA HARRY NV. BOLENS, OF PORT IVASIIINGTON, WISCONSIN.

GRINDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 655,7 53, dated August14, 1900. Application filed January 31, 1900- Serial No. 3,392. (Nomodel.)

To aZZ whom it may concern.-

Be it known that I, HARRY NV. BOLENS, a citizen of the United States,and a resident of Port Washington, in the county of Ozaukee and State ofWisconsin, have invented certain new and useful Improvements inGrinding-Machines; and I do hereby declare that the following is a full,clear, and exact de* scription thereof.

My invention relates to a class'of grindingmachines especially designedfor agriculturists, and has for its objects to simplify organization,reduce weight, cheapen production of the particular species of suchmachines shown in my Patent No. 636,192, of October 31, 1899, Withoutdetriment to their strength or durability, and to provide for automaticreciprocation of the carrier and grinding device when said machines areassembled for grinding knife-sections of mower and reaper sicklebars,said invention consisting incertain peculiarities of construction andcombination of parts hereinafter set forthwith reference to theaccompanying drawings and subsequently claimed.

Figure l of the drawings represents an elevation of .my improvedgrinding-machine, partly in section in a longitudinal direction, asindicated by lines 1 1 in the succeeding figure, said machine beingassembled for use as a grinder of edge-tools, the grinding-wheel beingbroken; Fig. 2, a plan view, partly in horizontal section, as indicatedby lines 2 2 in the preceding figure; Figs. 3 and 4, elevations, partlyin transverse section, as respectively indicated by lines 3 8 and 4: 4in the first figure; Fig. 5, another elevation, partly in section, asviewed in an opposite direction from the showing in said first figure,the machine being forthe most part assembled for use as a grinder forbarrow-disks or ledgerplates of mower and reaperfinger-bars, accordingto the face of the grinding device employed; but in this sameillustration dotted and full lines are utilized to show an assembly ofsaid machine for grinding the knife-sections of mower and reapersickle-bars Fig. 6, a plan view, partly in section, illustrating acarrier-frame, a grinding device for sicklebar knife-sections, and otherdetails of the machine; Fig. 7, a detail perspective view illustratingone of the joints between what is being made substantially as hereinshown to effect a saving in metal, as well as to lighten said machine.

To facilitate attachment of the machine to a convenient support,preferably a stool, the base is provided with a series of screw-holes,as is commonin the art, and, like in the patent aforesaid, a transversepart B of said base is provided with a central groove Z) in a directionlongitudinally of the machine for the engagement of a triangularknife-edge rib c v on the under side of a plate 0, cast in one piecewith a pair of parallel inclined standards D D, said plate and standardsconstituting what Iterm the standard-yoke of the machine, it beingobvious, however, that the'arrangement of said groove and rib may be thereverse of what is herein shown to provide for rocker-bearing of saidyoke on the aforesaid base. Opposing outer lugs d cl of the base and thestandard-yoke are bolted together, as in the above-named patent, and byadjustment of the nuts the proper set of said yoke is determined. Toinsure proper alinement of the standard-yoke in the assembling of themachine, I provide the base with central upper lugs e, facing theextremities of the rocker-bearing groove and rib aforesaid, this beingone of the features of my improvements.

The standard D has its upper end provided with a pivot-stud f forengagement of an eye in an end of what is commonly termed therocker-yoke E of the machine, the bow of said yoke, as herein shown,constituting a handle. The other end of the rocker yoke is provided withan eye loose on a reduction 9 of a spindle w, hereinafter moreparticularly described, a key-pin 72 being engaged with pivot-stud f ofthe former standard against a washer t to hold said yoke in workingposition. A brace j constitutes part of the rocker'yoke, and this yokeis provided with an outer stop-lug k, that plays in an upper IOO recess'm of standard D when the machine is assembled for sharpeningharrow-disks or the ledger-plates of mower or reap'er finger-bars, ashereinafter more particularly specified, this being another feature ofmy improvements.

Alined outer and inner pivot-studs n of the rocker-yoke engage eyesprovided in ends of bars F F, constituting parts of the carrier elementof the machine, and by means of a key-pin 0 engaging said outer studagainst a washer p the carrier is held in working position. A set-screwG, engaging an inner lug q of the rocker-yoke, constitutes an adjustablestop opposed to a lug 1', extending in from bar F of the carrier, andadjustment of the screw serves to determine the initial elevation of thegrinding device I-I (shown in Fig. 6) with respect to the knife-sectionsof a sickle-bar in' clamp on the machine, as shown in Figs. 5 and 8, sothat the points of said knife-sections maybe saved from harm. A stud son bar F of the carrier engages an eye in the upper end of a removablesupport I, having an inner foot t, that abuts some of a series ofvertical lugs u on base A, and is held in place by the sickle-barclamp-jaw J, that constitutes part of the machine. As a matter ofconvenience the support I is provided with upper angular recesses ofdifferent widths designed for the engagement of nuts and the head of abolt that constitute parts of the machine, whereby said support hasutility as a wrench when detached from the base of said machine. While Ihave shown and prefer a construction that provides for connection of thesupport I with the carrier to hold the latter rigid in the positionshown in Fig. 1, it is within the scope of my invention to otherwiseaccomplish the same result-as, for instance, the stud 5- may be on saidsupport to engage an eye in said carrier.

Like in the patent aforesaid, the free ends of the carrier are providedwith eyes that constitute bearings for flanged journals between which agrinding device is clamped. The long journal K for the grinding device Lshown in Fig. 3 is interchangeable with the shorter journal K for thegrinding device H shown in Fig. 6, and the journal K, common to all thegrinding devices furnished as parts of the machine, is provided withsprocket-teeth for a link belt M, the bar F of the carrier being offsetat its free end to obtain the necessary space for the latter journal. Abolt N, extending through journal K and adjacent grinding device, hasits threaded end screwed into journal K or K, these journals beinginterchangeable, and the head of said bolt being against said journal Ksaid grinding device is thereby clamped in working position by a pair ofsaid journals to turn with the same and said bolt, provision being hadfor the side thrust desirable in machines of the kind to which myimprovements relate. The interchangeable journals and the bolt, that hasits threaded end screwed tions.

into oneor the other of said journals, have been heretofore disclosed inthe application of John Gilson, Serial No. 736,035, filed November 6,1899, and I make no claim for same.

The link belt M is driven by a sprocketwheel 0, that runs loose on anouter stud v of the rocker-yoke and is provided with a pinion-hub O inmesh with a spur-wheel P, fast on the aforesaid spindle to, that turnsin standard D and its branch D, this spurwheel being provided with acrank.

The aforesaid clamp-j aw J is provided with stilt-lugs cc and alongitudinal slot y, this slot being engaged by a bolt Q, that extendsup through the base A, and run on the bolt against the upper surface ofsaid clamp-jaw is a thumb-nut R, by which pressure is had to bind asickle-bar S tight against said base and the vertical lugs u thereon, asshown in Fig. 5, knife-sections T of the sickle-bar being supported byrests U, rising from the aforesaid base, the elevation of these restsbeing such that the angle of said knife-sections is approximatelyparallel to that of the plane of reciprocation on the part of thecarrier and grinding device H therewith, it being understood that thesupport I is not in use when the machine is assembled for the purpose ofsharpening said sickle-bar knife-sec- It is also to be understood thatone long lug instead of a series of lugs u, at in-- tervals may beutilized to abut the sicklebar. The distribution of weight and leverageof the rocker-yoke, carrier, and grinding device H is such that notension-spring is necessary in connection with said carrier, the doingaway with such a spring being also a feature of my improvements. It isalso to be noted that when the machine is assembled for sharpeningknife-sections of sickle-bars the rocker-yoke, with the carrier (whenfree) and grinding device, may be swung back by the operator until thestop-lug 7c of said yoke comes in contact with a projection a ofstandard D, and thus said grinding device willbe, well up out of theway. I

As shown in Fig. 4, a pinionV is made fast on reduction g of spindle wby a key-pin b, and, as shown in said'Fig. 4 and in Fig. 8, this pinionmeshes with a spur -wheel W, that turns loose on a stud c,with which thestandard D is provided. Wristed to' the spurwheeljs a pitman X, made tohave detachable connection with a stud e of rocker-yoke E, as shown inFigs. 4 and 8; butit may be made to engage a cross-piece f of thecarrier, as shown by dotted lines in said Fig. 8. Either connectionbeing established,said carrier and the grinding device H therewith willhave automatic reciprocation when the machine is operated. It is alsoshown in Fig. 8 that provision may be had for varying the length ofstroke on the part of the pitman.

When the machine is assembled with a grinding device such as shown inFigs. 1 and 3, it is utilized for sharpening edge-tools, but when neededfor sharpening barrow-disks or the ledger-plates of a mower or reaperfingerbar the pinion V is removed and the pitman X placed in workingposition, the rockeryoke being detached from the standard-yoke and againconnected to the same in shifted position, so as to have its stop-lug 7bengage the recess m of the standard D, said rockeryoke and carrier beingthen positioned as shown. by full lines, Fig. 5. A grinding device V ofproper face for the work in hand being journaled in the carrier,- thelatter in the new assemblage-is manipulated to bring said grindingdevice in and out of contact with the surface or surfaces to besharpened, the pivotal play of said carrier being limited by its lug rin opposition to the rocker-yoke, and by reason of the engagement of lug7x3 with the standard-recess m said yoke (with said carrier and saidgrinding device) may be lifted a limited distance from the positionshown in Fig. 5 to increase clearance between said surface or surfacesand the aforesaid grinding device whenever necessary or desirable.

A continuous rod may be substituted for the studfand spindle w, and itis possible to otherwise vary the details of the machine withoutdeparture from my invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A grinding-machine of the species de* scribed having its base andstandard-yoke in rocker rib and-groove connection, means for determiningproper set of said yoke, and lugs on said base facing the extremities ofthe rocker rib and groove.

2. A grinding-machine of the species described having its standard-yokeprovided with an upper recess and its rocker-yoke provided with a lugengaging said recess in one assembly of the machine, a projection ofsaid standard-yoke at the upper terminus of the aforesaid recess beingin the path of said lug in another assembly of said machine.

3. A grinding-machine of the species described provided with a removablesupport held in working position bythe sickle bar clamp mechanism ofsaid machine, and means for holding the carrier element of the machinein rigid connection with the support at a predetermined elevation.

4. A grinding-machine of the species described having a removable partin the form of an angularly-recessed device by which the carrier elementof the machine is supported in a predetermined position, said devicebeing held in working position by the sicklebar clamp mechanism of saidmachine.

5. A grinding-machine of the species described having a standard thereofprovided with a stud, a spur-wheel loose on the stud, a pinion fast onthe drive-Wheel spindle of the machine and in mesh with the spur-wheel,a rocker-yoke in connection with the machine-standards, agrinding-device carrier in pivotal connection with the rocker-yoke, anda pitman in adjustable throw connection with the aforesaid spur-wheeland rockeryoke.

In testimony that I claim the foregoing I have hereunto set my hand, atMilwaukee, in

the county of Milwaukee and State of Wisconsin, in the presence of twowitnesses.

HARRY W. BOLENS. Witnesses:

N. E. OLIPHANT, B. O. ROLOFF.

